This will be a double-blind, randomized placebo-controlled study. 253 children were recruited and randomly assigned into one of 2 groups to receive either normal infant formula or formula with Bifidobacterium longum and Lactobacillus rhamnosus GG. The primary aim is to assess the effect of early administration (from birth) of probiotics on the incidence of allergic sensitization, eczema, asthma and rhinitis.